Chemistry Chapter 3 Notecards – Flashcards
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| matter |
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| the "stuff" which the universe is composed of. this "stuff" both occupies space and has mass. |
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| states of matter |
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| liquid, gas, solid |
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| physical properties |
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| are properties of a substance that involve odor, color, volume, state(whether it's liquid ,gas, or solid), density, meliting point and boiling point of a substance. |
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| chemical properties |
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| this term refers to a substance's ability to turn into a new one. this includes the burning of wood. |
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| chemical change |
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| is a change that involves the fundamental components of a substance. |
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| physical change |
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| involves a change in one or more physical properties but no change in the fundamental components of a substance. |
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| elements |
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| are substances that cannot be broken down any further by chemical means. ex. aluminum, oxygen, hydrogen |
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| compounds |
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| are made out of different elements. these can be broken down to elements by chemical changes |
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| mixture |
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| is something that has a variable composition(different elements make it up) |
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| pure substance |
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| is a substance that will always have the same compostion. these are either elements or compounds. ex. pure water is always H20. |
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| homogeneous mixture(solution) |
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| is a mixture that is made up of the same stuff all throughout. |
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| heterogenous mixture |
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| is a mixture that contains regions of different properties. ex. sand and water mixture. |
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| distillation |
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| is when water is purified. first, water is heated to boiling point. then the steam is collected and transformed back into water. The water that results is pure. |
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| filtration |
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| when you filter a substance out of another. you first pour the mixture onto mesh, then the solid part of the mixture is left behind. |
